Introduction to CAD/CAM/CAE CAD Lab.

Introduction CAD(Computer Aided Design) CAM(Computer Aided Manufacturing) CAE(Computer Aided Engineering) Memory capacity, processing speed, Interactive graphics Quality, Cost, Delivery

Product cycle

Solid model of example part

Finite element analysis model of example part Finite element meshes Load condition: case 1 Load condition: case 2

Stress distribution on example part Result for case1 Result for case2

Fill time distribution for example part

Physical prototype of example part

Part drawing of example part

Core, cavity, and side cores for example part

Completely designed mold base

NC tool paths to machine mold

Product cycle에서 컴퓨터의 적용 신속한 Design concept의 제공 Computer aided drafting system Geometric modeling system Parametric modeling

Product cycle에서 컴퓨터의 적용 – cont’

Product cycle에서 컴퓨터의 적용 – cont’ 강력한 해석기능의 제공 Stress analysis, interference checking Kinematic analysis, etc. Analysis model with proper abstraction Interactive generation of analysis model

Product cycle에서 컴퓨터의 적용 – cont’ Design evaluation을 위한 prototype 제공 Rapid Prototyping (RP) Virtual Prototyping (VP)

RP - Stereolithography Process Cured Plastic XY Scanning Ultraviolet Laser Beam Photo-curable Resin(Liquid) Top of the Liquid Elevator Vat Platform

Virtual Prototyping of Engine

Virtual Prototype of Equipment Construction Equipment from John Deere (Division Inc.)

Product cycle에서 컴퓨터의 적용 – cont’ 편리한 design documentation 기능 제공 Computer aided drafting system Automatic drafting program

Product cycle에서 컴퓨터의 적용 – cont’

Product cycle에서 컴퓨터의 적용 – cont’ Process plan의 자동 생성 NC program의 자동 생성 Robot, CMM 구동 프로그램의 자동 생성

Definitions of CAD, CAM and CAE Creation, modification, analysis, optimization Computer graphics + design을 위한 application program Tolerance analysis, mass property calculation Finite element modeling and analysis

Definitions of CAD, CAM and CAE – cont’ CAD – cont’ Design geometry를 정의하는 것이 기본기능 Design geometry가 product development cycle의 핵심 Computer aided drafting system, geometric modeling system이 CAD system의 핵심

Definitions of CAD, CAM and CAE – cont’ Plan, manage, control of manufacturing operations NC가 가장 활용도가 큼 Robot programming for material handling, welding, assembling, etc.

Definitions of CAD, CAM and CAE – cont’ CAM – cont’ Process planning의 자동화 Group technology Feature recognition or feature based modeling MRP(Material Requirement Planning)

Definitions of CAD, CAM and CAE – cont’ Analyze CAD geometry Simulate, refine and optimize the design Kinematic program, large-displacement dynamic analysis, etc.

Definitions of CAD, CAM and CAE – cont’ FEM이 가장 대표적인 CAE software Stress, deformation, heat transfer, fluid flow, magnetic field, continuous field problem Abstract model과 mesh 필요

Definitions of CAD, CAM and CAE – cont’ Abstract model은 detail을 없애거나 dimension을 낮춤 Mesh 생성은 preprocessor에 의해 계산 결과는 postprocessor에 의해 Optimization과 FEM의 결합 초기에 설계 결함 확인